Improvement in steam-pumps



L. J. KNOWLES.

STEAM PUMP.

Patented Apr. 18, 1871.

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Letters Patent No. 113,897, dated April 18, 1871. y

IMPROVEMENT IN STEAM-PUMPS.

The Schedul referred to in these Letters Patent and making part of the same.

To all whom it may cncern: l

Beit known that I, LUcIUs J. KNowLEs, of the city and county of Worcesterand State of Massachusetts, haveinvented certain new and useful Improvements in `Steam-Pumps; and II do hereby declare. the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing which forms a part of this. specification, in which- Figure 1 represents a central longitudinal `section of the pump-cylinder and valve-box; v

Figure 2' represent-s a transverse section of the valve-box at the position indicatedby line A B onf.

1i 1. lo enable those-skilled in the art to which my invention belongs to make and use the same, I wili prof D, the discharge-chamber. f

E E indicate the ednction-yalves, which close the passages F F from the cylinder A to the dischargechamber 1);' and G G' indicate the iinluction-valves, which close the I passages I l from the supply-chamber C to the cylinder A.

` The lower portion of the shell J or frame of the valve-box, below the discharge-chamber D, is cast with the cylinder, while the upper part J is cast in a sepa- 'rate piece, and is secured to the lower part J by the screws or bolts a.

Recesses are formed in thc upper part of the shell 'J to receive the stems or hinges of the valves E E',

the seats of said valves being in a horizontal position,V

from which they open upward into the dischargechamber, as indicated. Y

The valves AG G' are hinged at'their upperv sides in recesses formed in the diagonal partitions H, which divide the supply-chamber from the spaces K K, above thc parts L L', at the ends of the cylinder A.

The valves G G' open outward from the passages I I into the spaces K.

The valves E E G G are hinged upon pivot-rods N, which pass through the valve-box in a transverse direction, as shown. v

The rods N are made shorter than the :distance through the valve-box, and thc openings at the end of the rod are counter-bored and tapped-to receive screws or bolts M, which are screwed into the openings against the ends of the rods N, whichv latter are thereby retained securely in position.A

The screws or bolts M form watcr.- tight joints at the ends of the ,pivot-rods,and "also facilitate the operation of removing the valves, since, by removing the screws at either end ofthe rods, the

latter can be removed, thereby releasing the valves.

Instead of forming the rods -N separate from the screws M the rod and screw may be made in the same piece, in which case but one-side of the valvebox would require to be bored through the other extremityfof the rod N, being simply inserted in a pocket formed for its reception at the inner side of the shell. y A

Elliptical openings, S, are formed in the upper part of the shell, directly over the valves E E', through which access is permitted `to the interior of the valvebox. Y

"These openings are closed by means of removable inside plates O, whicht the interior of the openings, where they are supported by means of crossbars P arranged across the opening at the outside oi' the shell, and to which the inside plates are attached by center' bolts Q, which pass up thronghthe cross-bars P, and are furnished with hand nnts, 1t, at their upper ends. I

By' loosening the nuts R the cross-bars can be swung around, thereby allowing the inside plates O, together with the parts connected therewith, to drop down into thc interior of the valve-box, and thus readily allow access to the valves.

Then the inside plates are let down the valves E and Eican be raised so that they will stand in a vertical position, their upper cnds swinging np into the openings, and when in this position access is obtained to the valves G G through the passages F F.

From the foregoing description it will be seen that bymyimprovexnents the valves can be readily reached for examination, removal, or repair, and that, too, without the use of any tools or the exercise of more skill than that possessed by an ordinary laborer, the time required for removing and replacing the inside plates being but a few moments, wlieiebyinuch time and trouble is saved as compared with the time and labor occupied in examining the interior of pumps as ordinarily constructed.

Having described my improvements in' steam- Pumps,

What I claim therein as new and of my invention, and desire to secure by Letters Patent, is-

1. The combination, with the induction-valves G G' and their seats, of the eduetion-valves E Ef and their seats, openings S, and inside removable plates O, when said parts are constructed and arranged in relation to each other, substantially as shown and described.

2. The combination, with the valve-stems, of the removable pivot-bars N and holding screws or bolts M, substantially as and for the purpose set forth.

lLUCIUS J. KNOWLES.

Witnesses:

THos. H. DODGE, ,GHAs H. BURLEIGH. 

